從結束的修剪字符串

Question

我想從字符串的末尾字符串字符串，是否有任何字符串的API函數，它只能從字符串的END中刪除空格和換行符。

我寫了手動代碼從字符串的末尾搜索字符並刪除空格和換行符，但它可能會減慢進程。

API函數所需..

在此先感謝

Answer 1

試試這個可能是它可以幫助你，

-(NSString *)removeEndSpaceFrom:(NSString *)strtoremove{ 
    NSUInteger location = 0; 
    unichar charBuffer[[strtoremove length]]; 
    [strtoremove getCharacters:charBuffer]; 
    int i = 0; 
    for (i = [strtoremove length]; i >0; i--){ 
     if (![[NSCharacterSet whitespaceCharacterSet] characterIsMember:charBuffer[i - 1]]){ 
      break; 
     } 
    } 
    return [strtoremove substringWithRange:NSMakeRange(location, i - location)]; 
} 

和

NSString *string = @"   this text has spaces before and after   "; 
    NSString *trimmedString = [self removeEndSpaceFrom:string]; 
    NSLog(@"%@",trimmedString);